International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP A/1 RESISTANT HOOD CANARYGRASS
(Phalaris paradoxa)


ACCase inhibitors (A/1)

Mexico, Gunajuato, Jalisco, Michoacán
INTRODUCTION HOOD CANARYGRASS
Hood Canarygrass (Phalaris paradoxa) is a monocot weed in the Poaceae family.  In Mexico this weed first evolved resistance to Group A/1 herbicides in 1996 and infests Wheat.   Group A/1 herbicides are known as ACCase inhibitors (Inhibition of acetyl CoA carboxylase (ACCase)).  Research has shown that these particular biotypes are resistant to clodinafop-propargyl, fenoxaprop-P-ethyl, pinoxaden, and tralkoxydim and they may be cross-resistant to other Group A/1 herbicides.

The 'Group' letters/numbers that you see throughout this web site refer to the classification of herbicides by their site of action. To see a full list of herbicides and HRAC herbicide classifications click here.

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QUIK STATS (last updated Apr 18, 2012 )

Common NameHood Canarygrass
SpeciesPhalaris paradoxa
GroupACCase inhibitors (A/1)
Herbicidesclodinafop-propargyl, fenoxaprop-P-ethyl, pinoxaden, and tralkoxydim
LocationMexico, Gunajuato, Jalisco, Michoacán
Year1996
Situation(s)Wheat
Contributors - (Alphabetically)Ken Sayre, and J. Antonio Tafoya-Razo 
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ACADEMIC ASPECTS

Confirmation Tests

Field, Greenhouse, and Laboratory trials comparing a known susceptible Hood Canarygrass biotype with this Hood Canarygrass biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information.
 
Genetics

Genetic studies on Group A/1 resistant Hood Canarygrass have not been reported to the site.  There may be a note below or an article discussing the genetics of this biotype in the Fact Sheets and Other Literature
 
Mechanism of Resistance

The mechanism of resistance for this biotype is either unknown or has not been entered in the database.  If you know anything about the mechanism of resistance for this biotype then please update the database.
 
Relative Fitness

There is no record of differences in fitness or competitiveness of these resistant biotypes when compared to that of normal susceptible biotypes.  If you have any information pertaining to the fitness of Group A/1 resistant Hood Canarygrass from Mexico please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

KEN SAYRE
Cimmyt
International
International Maize And Wheat Improvement Cen
Weed Science Bldg 258
PO Box 110505,
Mexico, CP 06600
Mexico
J. ANTONIO TAFOYA-RAZO
Proffesor-Researcher
Universidad Autónoma Chapingo
Parasitología Agrícola
Ariel Rios Building
Mail Code:7505P, 1200 Pennsylvania Avenue, N. W.
Chapingo, 56230, México
Mexico
Email J. Antonio Tafoya-Razo

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Mexico have been instrumental in providing you this information. Particular thanks is given to Ken Sayre, and J. Antonio Tafoya-Razo for providing detailed information.
Herbicide Resistant Hood Canarygrass Globally
(Phalaris paradoxa)
Herbicide Resistant Hood Canarygrass Globally
(Phalaris paradoxa)
Drag a column header and drop it here to group by that column
Herbicide Resistant Hood Canarygrass Globally
(Phalaris paradoxa)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (New South Wales ) AustraliaNew South Wales 1997 Wheat, and Winter pulses fenoxaprop-P-ethyl, and sethoxydim 1 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass1137
2 Australia (New South Wales ) AustraliaNew South Wales 2012 Spring Barley, and Wheat clodinafop-propargyl, and mesosulfuron-methyl 1 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
128Phalaris paradoxaHood Canarygrass7840
3 IranIran 2007 Winter wheat diclofop-methyl 79 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass5342
4 IsraelIsrael 1979 Railways, and Roadsides atrazine 23 Photosystem II inhibitors (C1/5)
128Phalaris paradoxaHood Canarygrass96
5 IsraelIsrael 2004 Peas, and Wheat clethodim, clodinafop-propargyl, cycloxydim, diclofop-methyl, fenoxaprop-P-ethyl, fluazifop-P-butyl, haloxyfop-P-methyl, and tralkoxydim 23 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass5299
6 ItalyItaly 1998 Wheat clodinafop-propargyl, diclofop-methyl, pinoxaden, and sethoxydim 24 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass5108
7 MexicoMexico 1996 Wheat clodinafop-propargyl, fenoxaprop-P-ethyl, pinoxaden, and tralkoxydim 29 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass5479
8 SyriaSyria 2015 Faba beans, Potatoes, and Wheat clodinafop-propargyl, and fenoxaprop-P-ethyl 69 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass15059
Literature about Similar Cases

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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Thursday, March 23, 2017 .  Available  www.weedscience.org
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